EVIDENCE FOR AN IMIDAZOLATE-BRIDGED FE(II)-CU(II) COMPLEX IN SOLUTION

被引：19

作者：

KOVACS, D ^{[1
]}

SHEPHERD, RE ^{[1
]}

机构：

[1] UNIV PITTSBURGH,DEPT CHEM,PITTSBURGH,PA 15261

来源：

JOURNAL OF INORGANIC BIOCHEMISTRY | 1979年 / 10卷 / 01期

关键词：

D O I：

10.1016/S0162-0134(00)81006-5

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

Two new Cu(II) chelate complexes, Cu(imepH)2+ and Cu(bidH2)2+, have been prepared that contain a titratable pyrrole hydrogen of a coordinated imidazole moiety. The deprotonated species, Cu(imep)+ and Cu(bidH)+, have been observed to form imidazolate-bridged complexes with Fe(TIM)(CH3CN)22+ in 60% CH3CN:40% CH3OH (V:V). The presence of binuclear complexes at equilibrium with the monomer species in this solvent is confirmed by the appearance of a new CT band (∼620 nm) and altered electron spin resistance (ESR) spectra for the Cu(II) chelates. The binuclear species are O2 sensitive; the bridged complexes I = [Fe(TIM)(CH3CN)(imep)Cu]3+ and II = [Fe(TIM)(CH3CN) (bidH)Cu]3+ are discussed in terms of the Palmer model for the heme a3-Cu(β) interaction in cytochrome oxidase. © 1979.

引用

页码：67 / 88

页数：22

共 29 条

[1] BIOLOGICAL ANALOGS - NATURE OF BINDING-SITES OF COPPER-CONTAINING PROTEINS [J].